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TIL most black olives are just unripe green olives treated with a solution to darken them

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Mwd8 TIL A Group Of Feral Cats Is Called A Destruction
ADZno TIL that an American soldier, Henry Gunther, was the last casualty in World War I. He was killed at 10:59 a.m., one minute before the Armistice was to take effect at 11 a.m.
BgRrr TIL The "57" stamped into glass bottles of Heinz 57 ketchup is where you're supposed to tap the bottle for maximum flow of ketchup.
nWLoP TIL about unit 731, a Japanese prison camp that engaged in biological and chemical warfare experimentation that resulted in over 10,000 deaths
VMjmp TIL that raising the drinking age to 21 significantly reduced the number of alcohol related traffic fatalities for people aged 16-20 in the U.S. by 64 percent, according to the NIH.